Collapsible stool



FIG. 1 is a top, front, left side perspective view of a first embodiment of a collapsible stool showing my design in a closed configuration;

FIG. 2 is an alternate top, front, left perspective view thereof;

FIG. 3 is a bottom, front, left side perspective view thereof;

FIG. 4 is a front elevational view thereof, the rear view being identical thereto;

FIG. 5 is a left side elevational view thereof, the right side view being identical thereto;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front, left side perspective view thereof, shown in a partially open configuration;

FIG. 8 is an alternate top, front, left side perspective view thereof;

FIG. 9 is a bottom, front, left side perspective view thereof;

FIG. 10 is a front elevational view thereof, the rear view being identical thereto;

FIG. 11 is a top plan view thereof;

FIG. 12 is a top, front, left side perspective view thereof, shown in an open configuration;

FIG. 13 is an alternate top, front, left side perspective view thereof;

FIG. 14 is a bottom, front, left side perspective view thereof;

FIG. 15 is a left side elevational view thereof, the right side view being identical thereto;

FIG. 16 is a front elevational view thereof, the rear view being identical thereto; and,

FIG. 17 is a top plan view thereof.

The broken lines in the drawings represent portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a collapsible stool, as shown and described. 